Blow-out patch for pneumatic tires.



J. N. DAViS. BLOW-OU? PATCHv FOR PNEUMATIC TiRE'S.

' AyPLxcATxoN mso APR.19,19:5. I 1,187,418. Patented June 13, 3.916(

oar/EC@ l. come .i adx JASPER. N. DAVIS, GE DENVER, COLORADO.

BLOV-OUT PANH FR PNEUMATXC TIRES.

momie.

.To all whom t may concern.'

Be it known that 1 JAsrnn' N. Davis, a citizen of the United States of America, re-

useful Blow-Ont latih for Pneumatic Tires,

of which the followingT is a specification.

' rThis invention relates to improvements "in the construction of blowoutpatches for vpneumatic tires.

The object of my invention is to lconstruct ablow-out patch for a cut or blown-ont outer casing, that will eliminate the disadvantages of all other makes of inside blowout patches known to me, on the Inarlret at the present time. YIn such a construction i rovide a blow-out patch that is 'self-adjust.- lng and that will wear as long,r as a vulcanized sectionin an outer casing.

The objects of my improved construction as outlined above will be understood from the following specifica-tion and accompanying drawings, wherein Figure l1, is a vertical, transverse sectional view through an automobile 'tire and rim,

provided with my improved inside blow-ont patch. Fig. 2,1is a vertical, longitudinal seetional View of a portion of a tire equipped as 'shown in Fig. 1, parts of the patch being broken' away to show the hooks engaging the inner surface of 'the tire. Fig. 3, is a side view of a portion of the blow-out patch, partly broken away, and showing a different style of hook from that shown in Fig. 2. Fig. 4, is a diagrammatic view showing the manner of folding the blow-out patch. Fig. 5, is a plan view of the` blow-out patch in flat or unfolded position. Figs. G, 7 and-S are perspective views of different forms of h ooks employed in connection with the blowout patches. And Fig. 9 is a sectional View of metal side braces which may be used in connection with the hooks shown in F igs. 6, 7 and 8.

Similar letters of reference reler to similar lparts throughout the several views.

The patch may bc made of {in}T suitable material ot which blow-ont patches are made with reference to flexibility, but differs from other patches in its construction and the means for securing it in place, in the protection aiforded bythe tread or' the patch against Wear from the road bed, and from bulging through a cut orblow-out in the Specification of Letters Patent.

"shown in Fig. l,

rarest-ea aan@ is, raie.

Application-tiled April i3, 1915. Serial No. 22,4??

casing. in this construction, one of the serious disadvantages eliminated is that re'- 'ferred to respecting the tread.

it is well known by all experienced tire repair-men that a blow-out patch is very short lived for two reasons: .liirsh when" a blow-out patch'is put in a casing over -a blow-ont hole, the patch soon, if not immediately, comes in. contact with the tread of the road through the blow-out hole in the casing, resulting in the short life of the blowout patch, because oi" its being worn through by the road had. will protect the fabric construction of a pneumatic tire from wear oi' aroad bed, aswill rubber, therefore l coat the treadportionI oi? my blewfout p atch with a sullicient l thiclmcss'oi rubber vulcanized on it to protect it.

This increases the cost but also lincreases the lite ot' the patch in a much greater proportion.4 The second reason whi'chis well known, is that a cut or small blow-out in a casing will soon pinch through' the lain-ic of a blow-out patch. whereas a rubber covered blow-out patch will not i is vulcanized to the inner lap of the folded member 5: and 7 is the inner tube of the ti rc. The main patch 5 is made up of a sheet of suitable flexible material, as shown in Fig. 5, and provided with two rows of holes 8, which are. suitably spaced with reference to the size and strength required in the makeup of the patch. The layers of material shown in 'lT 4. and 5 embody, the construction or design of my blow-out patch as Through the holes 8; i the patch, are passed metal hooks 9, which are shown in Fig. l, embedded into the in-v 'ihcre is no material that ner surta ce of the fabric 3 of'the tire nearthe ing a blow-out patch over av blow-out in a tiro because of the advantages it presents over all other methods known to me, Some oi" which methods are as follows:

First, the employment of'a small loose patch which is placed over acut, puncture' `these to he impracticahle on account of their stiffness in applying the clips around the bead and the diiiiculty in getting a tire on the rim after the blowout patch has been put in position. When used with tight litting casings, it is` almost impossible to get a tire on, and after it is on the case in many instances being old and stretched the blowout patch loes not lill the oif'cr--siacd space in the casing and the result is a pinched tube, ,because it heinp,p forced between the tire and blow-out being pinched.

Third. there are Vthose' forms 0i hlow-out 'patches haviner extended flaps on each side. These l find to be satisfactory under certain comlitionsfif atire is nottoo old and stretched to over-size, then theiblow-out patch with, the size corresponding to the case will lit the insideof the case; if the case is, alittle stretched the tube will pinch at the ends of the blow-out patch7 as -n'e'- ferrcd toabore. .lt also happens many times that side iiaps or ears as they are sometimes called, are vpulled out too far, in whichl case the tube will pinch, even though 'the case hasnot stretched to over-size. The latter trouble is very comn'ionly causeduwith patches which are made in one size to he used intwo or three sizes oil easings. lt is almost impossible to get them to fit the inside without leaving' a little space between the patch and case', and the result is as hctore. a pinched tube.

'it isalsc lound that iu the majority oli cases the the lits the rims so closely that it is very dilcult to not a tire on with the flaps of 'the blow-out patch coming between the tire and rim, cron though it is only one thickness of fabric; then when it is desired to put in one, two or three more patches in order to get more service out ci the tlre, it then becomes impossible to get the tire on,

'oxraccount ot' the liaps of the patches n1ak- .ingthe 'case fit too tight. My improved blow-out patch is constructed to eliminate these`disadrantaies, which cause unneces- Sary expense to the mvncrs or" automobiles and theepense in loss of time to the 2garage or tire nien in haringr to change tubes two or more times lue to the pinching olf tubes and from hammering' on cases to drive their. on over the flaps which makes them lit too tight. f l With lthe enn'iloynieut ci my improved bleu/out patch, a. tube will not he pinehec patch results in the tube -View of the finished mener@ between. the case and patch by the patch not -{itting tight against the inner surface of the tire when applied. 'There will bc nov space left between the patch and tire after the/in# ner tube has been inflated, as the patch is self-adjusting to the inner surface of the tire, this feature being my main advantage f over other makes, as Will be explained farther on.

The metal hooks 9 shown in place in Figs.

l, Q, and 3, can be made of several shapes, a fewvo'wlnch are shown 1n Figs. (i, 7 and 8. These hools are nia de of. tempered steel and the end portions are bent at hooking angles and are sharpened, to a point. Throughthc holes S, in the fabric material shown in lili?.V 5. the hooks are'placed. before .the fabric is fr,

i. lded into the shape-shown in 4. Fig.

l also shows an extra layer of i'abric G,.e.. tendingf down past the ends of the hooks.l for a purpose to be explained later.

ln making my blow-out patch, -the material is covered with a coating of vulcanizing rubber cement, and when folded to shape' and size, toire-ther with the layer 6,'unvulcanized rubber is then applied to thetread thereof, and when the blow-out patch is vulcanized to the inished'forln it will appear as shown in Fig. l, in position in a tire. ln Fig. 3 also is shown a broken-away vblow-out patch. The

hooks ll shown in this figure are of the style shown in Fig. 8. L

The function or" my n'nproved hlouout patch and the'nmnner of applying itin a' blown-out tire is as follows: The blow-out patch is placed ink the tire or outer casingover the place-to be protected. The tube is then placed in the plow-out patch'as shown in Fig. l, and the tire is fitted on the rim andv secured thereto in the usual manner. As the tube 'i' is iniiated with air. the rnfessure iirst presses the blow-out patcll'arrainst the cas iup; hccause'the upper portion Aoi' the patch presents a. greater a rea than the lower portions thereof where the anclu'n'ing hooks 0 are located. Therefore bei'orcthes'e hooks 9 have sullcient air pressure exerted lagainst them to force them into the fabric bed' of the casing, the upper portion of the blow` out patch has fitted itselt' to the inner sur- 't'acc of the casing', leavingr no possible space between the casing and the blow-out patch into which the-tube may be forced by the air pressure. with the consequent pinching referred to above, as would result with patches, which are first locked at the hottoiu of the casing by means oi the [laps or metal clips7 making the' blowlout patch rigid in place with-no chance t'or the air pressure in the ico tube to first l'orce it up against the surface of the casings by the terminal portions r l adjacentrportions of the inner reinforce-l ment 6.

The anchoring hooks 9 shown in'Fig. 2, are similar to the hooks 13 and 14: shown in Figs. 7 and 8, being embedded into the bead 'of titl out i f corre..

rif'he two rnctal plates are bent in thc form` the tire, as 'can be more clearly seen from Fig.' l. ln Fig. 2, the patch 5 is broken away toshow the head portions of the hooks in place. The terminalportion of the inner layer 6 of the patch which covers the hooks, is also shown broken away. The inner tube portable protecting flap 12, which extends around. the tire between the wheel. run l and the inner tube 7, is also broken away.

This flap is commonly used and protects the 1 tube from the rust of the rim 1 and the pinching of the tube 7, which sometimes occursibetween the tube and the tire, the pos ition of this ldap being clearly shownplnr ltiwlg. l.; l

The tread of the. tire, as shown in Flg. 2, has a hrokenfaway place l5, which represents a lrxlow-out, cut or worn out place in ihe tire, which extends through the rubber- 2 andtheiabric 3. The section shows my blow-out patch protecting this injured place n the e., the rubber a covering the hole -shm'vn in Fig. 9, which consists of a plate ci metal extending the length o1v the blowh. on both sides, with holes in them ending to the holes in the fabric.

shravn, the hooks being putv through the holes before the iabric'is Jfolded and vul- -canizcd to shape and finish. They alsov strengthen the patch incases where a very large or long injury is made in a tire.y

lizfoni the foregoing description taken in connection with the accompanying drawings, the construction and operation of my im provcinent can be seen and understood to bc a seit-adjusting blow-out patch and by theA seltadiusting construction .the annoyance and expense of pinched tubes, and the unnecessary premature wearing out of blowout patches, and the diiiiculty ol putting on and removing tires, is entirely eliminated.

Other forms of construction may he usedin securing these anchoring hooks or staples or a hinged toi-rn to the sides or cdges 'of the blot/nut patch without departing from the principles of an inner securing adjustable blow-out patch embodied in my improvement. i

Having thus described my invention, what I claim'asnew and desire to secure by Letters Patent, is:

1. In a blow-out patch for pneumatic tires,-a sheet of suitable lexible material, folded upon itself to form three laps of substantially equal length, and hooks which extend through the portions where the two bends occur.

2. In a blow-out patch for pneumatic tires, apiece of suitableflexible material foldedy upon itself, to form three laps o f substantially equal length, the longitudr nal -free end of the middle lap terminating within the bend Jformed by the two outer laps, and hooks which extend through the material at the points where the two bends occur.

3'. In' a blow-out patch for pneumatic tires, a piece ofjsuitahle iexible material folded upon itself to form three laps of substantially equal length, the middle lap ter-0 minating within the bendv formed by the two puter laps, the whole being given a U-shaped curve, and hooks which extend through the material where the two bends occur, the points of which project outward.

4. In a blow-out patch for pneumatic tires, a piece of suitable flexible material bent upon itself to formthree laps of equal l 'lengtln the middle lap terminating within the bend formed'by the two outer laps, the whole being given, a U-shaped curve, and T- shaped anchors which extend through the material where the bends occur, the Shanks of which are bent outward near their lower ends and are pointed.

5. The combination with a pneumatic tire comprising inner and outer tubes, of a patch interposed between the said tubes, the longitudinal edges of which terminate. adjacent the terminal edges of the outer tube, and hooks in the terminal edges of said patch', the points of which'are adapted to be embedded in the adjacent portions of said outer tube, when the i'nne'r tube is inflated.

6. The combination with a pneumatic tire comprising inner and outer tubes, of a patch interposed between said tubes, comprising a piece of Lsuitable liexible material bent upon itself to present three laps of substantially equal length, the middle lap terminating in the bend formed bylvthe two` outer laps, and T-shaped anchors which extend through the patch where the bends'occur, having outwardly bent pointed ends which are embedded in the outer tube'near the terminal edges thereoffwhen the inner'tire is tween the saidv tubes, the longitudinal edges ofwhich terminate near the terminal edges of the outer tube, the tread portion of said patch having a rubber coating, and anchors L' at the terminal edges of said patchhaving outwardly bent pointed ends, which are adapted to be embedded in the terminal portion ofthe outer tube, when the inner tube is inflated.

8. The combination with a pneumatic tire comprising inner and outer tubes, of a'patch interposed between thesaid tubes consisting of a piece of suitable'iexible material folded upon itself' to form three laps of equal ll?- length, the looped,y edges of said patch ter-` minating adjaeentlthel terminal edges of the outer tire, a coating of rubber vulcanized upon the tread portion ofthel patch, and Tf shaped anchors extending throughv the 2U looped edges of said patch having outwardly extending pointed ends Which are adapted to be embedded in the adjacent portions of said outer'tire by pressure from the inflating of the inner tire. i

15 9. The combination with a riin and an. inner and outer tire, of a vU-shaped patch,A

comprising a piece of suitable flexible inaterial folded upon itself to Iform three laps of substantially equal length,` the tread por- 50 tion 'of said patch 'having a coating of rubber vulcanized thereon, T-shaped anchors which extend through the terminal looped edges of saidvpatch, having outwardly bentV pointed ends, a reinforcing lmember within 3W said patch7 the terminal edges of Whichare adapted to bear against the said anchors, said patch and i'ts reinforcing member being the inner tube.

interposed between the inner and outer tubes, the pointed ends of said anchors bein embedded in the adjacent portions of sain. outer tube, when thepatch and its reinforcing member are expanded by the inflation ot 10. In a blow-ou*`I patch. for pneumatic tires, a U-shaped sheet of suitable material,

` having anchors along its terminal longitu diiial edges provided with outwardly bent pointed ends and a rubber facing upon its tread portion. l

11. Ina blow-out patch for pneumatic tires, a lU-shaped sheet of flexible material, having anchors along its terminal longitudinal edges provided with outwardly bent hook-shaped pointed ends, and a reinforc ingsheet of suitable material within the said patch and vulcanized thereto, the longitudinal edges of w ich terminate beyond the` JASPER N. Davis.

Witnesses: 1 Y

Many E. Davis,l IDA Davis. 

